Artículos de revistas
Time-based injection approach for monosegmented continuous flow systems and related techniques
Registro en:
Journal Of Automatic Chemistry. Taylor & Francis Ltd, v. 18, n. 6, n. 199, n. 203, 1996.
0142-0453
WOS:A1996WB58200002
Autor
deAndrade, JC
Poppi, RJ
Coscione, AR
Institución
Resumen
A time-based injection module for monosegmented continuous flow systems and related techniques, which uses three independently controlled solenoid valves, is described. A timer circuit employing three I.C. 555s and three TIP-121 transistors was constructed to control the injection module valves. The injection device was tested with non-reacting chemical systems (for example with a spectrophotometric standard and calcium flame emission) and with reacting conditions (for example the determination of Cr(VI), using diphenylcarbazide as colour reagent, and acid-base titration). The performance of this injection module demonstrates its suitability for everyday use. 18 6 199 203